State Police returned to the scene of a crime along Interstate 99 Tuesday morning one week after a woman was killed by a hit and run driver.Drivers were being stopped and questioned near the Toftrees Exit where the body of Sherry Houtz was discovered.Police are looking for a small pickup truck or car with front end damage.Investigators say her body was not dumped along the Interstate.No word yet on whether any of the early morning commuters were able to provide new details on her death.Centre County Crime Stoppers is offering a one thousand dollar reward for any information that could lead to an arrest.